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Description
Material HSSE
Thread size M4
ChamferC (2–3) threads
Standard DIN 376
Technical data for the M4 HSSE INOX general-purpose machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M4 |
| Thread Pitch P | 0.7 mm |
| Overall Length l1 | 63 mm |
| Flute Length l2 | 13 mm |
| Shank Diameter d2 | 2.8 mm |
| Square Drive Size a | 2.1 mm |
| Tap Drill Diameter | 3.3 mm |
| Chamfer | C (2÷3) P |
| Thread tolerance | 6H |
Where chips remain in a straight-flute tap
The flute holds the chips until the tap is reversed out
The straight flute runs parallel to the tap axis. There is no helix to carry chips upward. The chamfer cutting edges are not ground at an angle, so they do not push chips downward. Short chips break into fragments and remain in the flute, next to the cutting edges that produced them. They leave the hole only when the tap is backed out. The M4 x0.7 tap has a reduced shank to DIN 376: diameter 2.8 mm, square size 2.1 mm.
1
Straight flute – chips remain in the flute, next to the cutting edges that produced them.
2
Chamfer C: 2–3 incomplete threads on the tapered lead.
3
The tap rotates clockwise to cut a right-hand thread.
4
Individual fragments exit at the top, onto the workpiece surface.
5
A few fragments fall below the tip and exit through the bottom of the hole.
6
Feed 0.7 mm/rev, equal to the pitch of the M4 x0.7 thread.
M4 INOX machine tap – versatile HSSE tool
The HSSE series with a long shank in accordance with DIN 376, designed for manufacturing engineers and CNC operators, includes the M4 INOX machine tap with increased rigidity. The 6H tolerance in accordance with DIN 376 guarantees the dimensional repeatability required in series production of mechanical components with demanding specifications. The long shank eliminates vibration at high spindle speeds on machining centers. Its HSSE steel construction with 5% cobalt guarantees a hardness of 66 HRC and long cutting edge life in stainless and difficult-to-machine steels.
Key features of the M4 tap for through and blind holes
- Long shank to DIN 376 provides increased clamping rigidity and eliminates vibration at high spindle speeds on CNC machines
- Designed for stainless steels of austenitic grades 304 and 316, structural steels up to 800 MPa, and aluminum alloys and engineering brass
- Precision of the 6H tolerance required in the manufacture of mechanical, electronic, and industrial automation components with stringent accuracy requirements
- Durability thanks to HSSE steel with 5% cobalt allows 400-600 threads to be produced in structural steel with proper lubrication using tapping oil
- Compatibility with ER16 holders and tapping heads for CNC machining centers with synchronous tapping and axial compensation
- Universal M4 machine tap with form C directs chips correctly in both through holes and blind holes without the risk of jamming
The M4 HSSE machine tap is designed for series production on CNC machining centers requiring stable operation at high speeds. The M4 machine tap for through and blind holes is not recommended for hardened steels above 45 HRC. The tap drill diameter is 3.3 mm.
Cutting data for the universal M4 HSSE INOX machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 398-1592 | 279-1114 |
| MStainless steel / INOX | 5-10 | 398-796 | 279-557 |
| KCast iron | 5-15 | 398-1194 | 279-836 |
| NAluminum | 10-25 | 796-1989 | 557-1392 |
Thread preparation M4
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 3.3 mm
3 Tapping
M4
✓ Done!
Tolerance 6H
Standard: DIN 376 | Chamfer: C (straight) | Application: general-purpose (through and blind holes)
Tolerance 6H — metric thread tolerance classes
| Class | Accuracy | Application | Status |
|---|---|---|---|
| 4H / 4g | High | Precision connections, hydraulics | — |
| 6H / 6g | Standard | Machine building, general-purpose | SELECTED |
| 7H / 8g | Low | Large clearance, easy assembly | — |
6H = internal thread (nut, hole) | 6g = external thread (screw)
Frequently asked questions
The M4 HSSE tap is suitable for austenitic stainless steels 304 and 316, structural steels up to 800 MPa, ductile cast iron, and aluminum and brass alloys. It is not recommended for hardened steels above 45 HRC.
The nominal tap drill diameter for the M4 thread is 3.3 mm. The hole tolerance zone should be within the range of 3.2–3.4 mm. A hole at the lower tolerance limit produces a fuller thread profile, while a hole at the upper limit reduces tapping torque.
The M4 tap works with ER11 holders and tapping chucks with axial compensation. Synchronized heads with automatic tool change capability are recommended for CNC machines.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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